#include <stdio.h>
#include <string.h>

struct Books {
    char title[50];
    char author[50];
    char subject[100];
    int book_id;
};

/* 函数声明 */
void printBook(struct Books *book);
int main() {
    struct Books Book1; /* 声明Book1, 类型为Books */
    struct Books Book2; /* 声明Book2, 类型为Books */

    /* Book1 详述 */
    strcpy(Book1.title, "C Programming");
    strcpy(Book1.author, "Nuha Ali");
    strcpy(Book1.subject, "C Programming Tutorial");
    Book1.book_id = 6495407;

    /* Book2 详述 */
    strcpy(Book2.title, "Telecom Billing");
    strcpy(Book2.author, "Zara Ali");
    strcpy(Book2.subject, "Telecom Billing Tutorial");
    Book2.book_id = 6495700;

    /* 通过传 Book1 的地址来输出 Book1 信息 */
    printBook(&Book1);

    /* 通过传 Book2 的地址来输出 Book2 信息 */
    printBook(&Book2);

    return 0;
}

void printBook(struct Books *book) {
    printf("Book title: %s\n", book->title);
    printf("Book author: %s\n", book->author);
    printf("Book subject: %s\n", book->subject);
    printf("Book book_id: %d\n", book->book_id);
}